Evening performances at 8 p.m. will take place on Saturday, Wednesday Nov. 14, and Saturday, Nov. 17. Further matinees will be presented on Sunday, Saturday, Nov. 17, and Sunday, Nov. 18.

Written originally in German, the Rose Valley Chorus & Orchestra will perform the Boosey and Hawkes Metropolitan Opera English language version, with a hilarious script by Garson Kanin (author of "Born Yesterday") and lyrics by Howard Dietz.

The Strauss score is accompanied by an outrageous plot that involves a love triangle, mistaken identity, and revenge for a practical joke. Add a drunken jailor and everyone singing and talking to the audience, and you have an evening of constant enjoyment.

"The Fledermaus" cast includes David Price of Upper Darby as Eisenstein, Andrea Broido of Havertown as Rosalinda, Jennifer Graf of Quakertown as Adele, David Koh of Philadelphia as Alfred, Shelli Ezold of Havertown as Prince Orlofsky, Bill Gross of Merion as Dr. Falke, Edwin Nealley of Ardmore as Frank, Julie Zaffarano of Broomall as Ida, Jim Duey of West Chester as Frosch, and Bruce Conley of Philadelphia as Dr. Blind.

Kate Nealley of Ardmore is the stage director, Carol Freed of Wallingford is the music director, and the opera is produced by Bruce Conley.

All performances are fully staged, featuring a large chorus and a 30 piece orchestra. Tickets, available at the door, are $20 for adults, $17 for senior citizens (60 and over) and students, and $7 for children 12 years and under. Tickets bought in advance are discounted to $17 for adults, $14 for seniors and students; children are still $7. Send advance orders to the Rose Valley Chorus, Box 414, Media, PA 19063.